SKF 6312 2RS 60x130x31 mm

SKF 6312 2RS 60x130x31 mm - Single-Row Deep Groove Ball Bearing

SKF 6312 2RS is a single-row deep groove ball bearing manufactured by SKF, belonging to the 63 dimensional series and measuring 60x130x31 mm. The commercial designation 2RS indicates two elastomer seals, one on each side of the bearing. Its construction accommodates radial loads and permissible axial loads in both directions. The exact SKF sealing suffix, such as 2RS1 or 2RSH, requires confirmation.

Technical Specifications - SKF 6312 2RS

The dimensions and construction correspond to the SKF 6312 bearing series. The exact seal design and radial internal clearance class depend on the complete designation of the specific execution.

Parameters such as basic dynamic load rating C, basic static load rating C0, fatigue load limit Pu, limiting speed, mass and cage design are specified by SKF for individual 6312 variants. These values have not been assigned to the commercially designated 6312 2RS without confirmation of the exact product execution.

What Does SKF 6312 2RS Mean?

The designation consists of the manufacturer's name, the basic bearing number and information about the sealing arrangement.

SKF - Bearing manufacturer.

6 - Single-row deep groove ball bearing.

63 - Bearing dimensional series.

12 - Bore code corresponding to a nominal bore diameter of 60 mm.

2RS - Common commercial designation indicating two elastomer seals, one on each side of the bearing.

2RS and SKF Sealing Nomenclature

SKF documentation includes several sealing executions, such as:

• 6312-2RS1 - Bearing with two RS1 contact seals.

• 6312-2RSH - Bearing with two RSH contact seals.

• 6312-2RS1/C3 - Bearing with two RS1 contact seals and C3 radial internal clearance.

These designations do not identify identical products.

The commercial designation SKF 6312 2RS does not independently establish which exact SKF seal design is fitted.

Before purchasing or preparing technical documentation, verify the complete manufacturer designation marked on the bearing or its packaging.

Does SKF 6312 2RS Have CN or C3 Clearance?

In standard SKF nomenclature, the absence of a suffix indicating increased internal clearance generally means Normal radial internal clearance, CN.

However, the commercial designation 6312 2RS may be an abbreviated version of the complete product designation.

Therefore, neither CN nor C3 clearance should be assigned to a specific bearing without verification.

SKF 6312 2RS Dimensions

The principal mounting dimensions are:

• Bore diameter d: 60 mm.

• Outside diameter D: 130 mm.

• Width B: 31 mm.

Bearing dimensions: 60x130x31 mm.

The 60 mm bore corresponds to the nominal shaft diameter.

The 130 mm outside diameter determines the nominal bearing housing bore.

The 31 mm width must be considered when designing the axial location of the bearing and selecting associated mounting components.

These dimensions are also shared by other 6312 series executions, including open, shielded and sealed variants.

Construction and Operating Principle

SKF 6312 2RS belongs to the family of single-row deep groove ball bearings.

Its principal components include:

• Inner ring with a deep groove raceway.

• Outer ring with a deep groove raceway.

• One row of balls.

• Cage maintaining the spacing between the rolling elements.

• Two elastomer seals.

The deep groove raceways enable the bearing to accommodate radial loads and permissible axial loads in both directions.

The bearing has a non-separable construction. Its rings and rolling elements are not separated during normal installation.

The double-sided sealing arrangement limits the entry of external contaminants into the bearing and helps retain lubricant inside the rolling element assembly.

2RS Seals - Technical Characteristics

In the commercial designation 2RS, the number 2 indicates that both sides of the bearing are sealed.

Elastomer seals help prevent dust, fine contaminants and moisture from entering the rolling element area.

Their principal functions include:

• Protecting the raceways and balls against contamination.

• Limiting grease leakage.

• Reducing dependence on external sealing components.

• Helping maintain suitable lubrication conditions.

SKF 2RS1 and 2RSH executions use contact seals.

Contact between the sealing lip and its mating surface introduces additional friction, which must be considered when evaluating rotational speed and operating temperature.

The exact seal geometry depends on the specific execution.

A sealed bearing is not automatically suitable for immersion in water or exposure to high-pressure cleaning fluids.

Lubrication of SKF 6312 2RS

Double-sealed SKF deep groove ball bearings are normally supplied with a factory grease fill, depending on the execution.

The seals help retain grease within the bearing.

Grease service life depends on:

• Operating temperature.

• Rotational speed.

• Applied load.

• Seal design.

• Environmental conditions.

• Operating duration.

The exact grease type and operating temperature range must not be assumed without confirmation of the complete product designation.

Seal removal or additional lubrication should only be performed when permitted by the technical documentation for the specific bearing execution.

Radial Internal Clearance

Radial internal clearance describes the relative radial displacement possible between the bearing rings before mounting, under specified measurement conditions.

Operating clearance can differ from initial clearance because of mounting fits and temperature changes.

For example, SKF 6312-2RS1/C3 has C3 radial internal clearance. However, this does not mean that every bearing sold as SKF 6312 2RS has the same clearance class.

Correct selection requires verification of the complete designation.

Greater internal clearance does not automatically indicate higher quality or longer bearing service life.

Radial and Axial Load Accommodation

SKF 6312 2RS is a deep groove ball bearing primarily designed to accommodate radial loads.

Its deep groove raceway geometry also allows it to support permissible axial loads in both directions.

Correct bearing selection requires consideration of:

• Radial load magnitude.

• Axial load magnitude.

• Direction of applied forces.

• Rotational speed.

• Required operating clearance.

• Shaft and housing fits.

• Operating temperature.

• Lubrication conditions.

• Required calculated bearing life.

Deep groove ball bearings are not designed to compensate for substantial angular misalignment between the shaft and housing.

SKF 6312 2RS vs Other Bearing Variants

All the listed variants have the same principal dimensions of 60x130x31 mm.

However, they differ in closure design, lubrication arrangements, friction characteristics or internal clearance.

They must not be considered automatically interchangeable.

Alternative Designations and Reference Numbers

Natural commercial identification variants include:

• SKF 6312 2RS

• 6312 2RS SKF

• SKF 6312 2RS 60x130x31

• 6312-2RS SKF

• SKF 6312 sealed bearing

The designation 6312-2RS in this section is a commercial writing variation, not a confirmed complete SKF catalogue number.

Other SKF catalogue executions in this bearing family include 6312-2RS1 and 6312-2RSH. These must not be treated as identical without checking the actual product.

Bearing Selection and Interchangeability

Before ordering the bearing, verify:

• Manufacturer and complete catalogue designation.

• Bore diameter of 60 mm.

• Outside diameter of 130 mm.

• Width of 31 mm.

• Seal type.

• Radial internal clearance class.

• Required dynamic and static load ratings.

• Permissible rotational speed.

• Operating temperature.

• Lubrication conditions.

• Mounting fits.

• Required bearing service life.

Particular attention should be paid to differences between open, shielded and sealed executions.

A bearing from another manufacturer with dimensions of 60x130x31 mm can only be considered an alternative after confirming compatibility with the technical requirements of the application.

Identical dimensions alone do not establish complete interchangeability.

Typical Applications of 6312 Series Bearings

Single-row deep groove ball bearings of the 6312 series are used in rotating assemblies requiring radial load accommodation and permissible axial load support.

Typical applications of this bearing design include:

• Industrial machinery shafts.

• Power transmission systems.

• Gearbox assemblies.

• Rotating mechanical mechanisms.

• Production equipment.

• Electric motors with appropriately selected bearing specifications.

These are general applications associated with deep groove ball bearing construction. They do not constitute confirmation of compatibility with a specific machine, motor or OEM reference number.

Mounting and Operation

Before installation, clean and inspect the shaft and housing seating surfaces.

Verify the required mounting fits and alignment.

Mounting force must be applied directly to the ring being installed with an interference fit.

Force must not be transmitted through the balls and raceways.

Protect the seals against mechanical damage during installation.

Do not remove the seals or introduce additional grease without checking the manufacturer's recommendations.

Store the bearing in its original packaging in a clean, dry environment.

FAQ - Frequently Asked Questions

What are the dimensions of SKF 6312 2RS?

The bearing measures 60x130x31 mm. Its bore diameter is 60 mm, outside diameter is 130 mm and width is 31 mm.

What does 2RS mean in SKF 6312?

2RS is a commercial designation indicating two elastomer seals. The exact SKF seal execution must be identified using the complete manufacturer catalogue number.

Are SKF 6312 2RS and SKF 6312-2RS1 the same product?

Not necessarily. SKF 6312-2RS1 identifies a specific sealing design. The designation 6312 2RS is less precise and requires verification.

What radial internal clearance does SKF 6312 2RS have?

The clearance cannot be established conclusively from the abbreviated commercial designation alone. The complete SKF designation should be checked, particularly for C3 or C4 suffixes.

Is SKF 6312 2RS factory lubricated?

Double-sealed SKF deep groove ball bearings are normally supplied with grease. The exact grease specification must be confirmed for the particular bearing execution.

Can SKF 6312-2Z replace SKF 6312 2RS?

Not automatically. The 2Z variant has non-contact metal shields, while 2RS indicates elastomer seals. These differences affect contamination protection and operating conditions.

Can SKF 6312 2RS accommodate axial loads?

Yes. Its deep groove ball bearing construction enables it to accommodate permissible axial loads in both directions.

Are all 6312 bearings measuring 60x130x31 mm interchangeable?

No. In addition to dimensions, the seal design, internal clearance, load ratings, speed capability, cage construction and lubrication conditions must be compared.

SKF 6312 2RS - Key Information

SKF 6312 2RS is a single-row deep groove ball bearing manufactured by SKF, measuring 60x130x31 mm. The commercial 2RS designation indicates double-sided elastomer sealing. The bearing accommodates radial loads and permissible axial loads in both directions. The exact seal execution and radial internal clearance class must be confirmed using the complete manufacturer catalogue designation.

Available from the specialist industrial bearing supplier simmering.pl. Stock in Poland, worldwide shipping and technical assistance with identifying the correct bearing execution.